Curious Expedition [official site] is a wonderful thing. Taking on the role of a famous explorer/thinker, you'll lead a team of adventurers across randomised plots of land, packed with wonders to discover, dangers to overcome and volcanoes to tinker with. You will watch in horror as your allies resort to cannibalism and you'll celebrate as you discover salvation when supplies and sanity are running low. You'll also weep as you eat a donkey.
I've written about my own experiences and this weekend you can try the game yourself, for free. It runs in your browser so you won't even have to download anything. Cancel your evening plans and settle down for adventure.